Available evidence
Observed public SMIPACK material for a sealing-bar wrapper distinguishes film-only, pad-and-film and tray-and-film constructions and names millimetre fields for sealing and pack size, plus a mono-chamber tunnel example. That page is a question list for industrial buyers, not a US ranking claim and not a performance promise for this service. Buyer samples still define whether barcodes remain readable and whether packs stay stable after cooling.
What does the source not establish?
The source does not establish the buyer’s film shrink result, plant throughput in packs per hour, or which loading method the factory will actually quote. It does not prove that a semi-automatic pusher and a fully automatic continuous infeed are interchangeable. It does not cover filling, cartoning or pallet wrapping. Geographic SERP completeness for the United States is not claimed from that page view.